/Engine/Source/Runtime/Core/Public/ProfilingDebugging/CookStats.h
To register a callback for reporting stats, create an instance of this delegate type and add it to the delegate variable below.
typedef TMulticastDelegate_OneParam< void, [AddStatFuncRef](API\Runtime\Core\ProfilingDebugging\FCookStatsManager\AddStatFuncRef) > FGatherCookStatsDelegate